Patents by Inventor Wolffried Wenneis

Wolffried Wenneis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Alkaline cell or battery
    Patent number: 7407728
    Abstract: An alkaline cell or battery having at least one positive and one negative electrode which are separated by a separator and which are disposed, along with an alkaline electrolyte, in a housing, the separator being a non-woven fabric, a microporous foil, or a web made of one or a plurality of polymers, which are formed by copolymerization or grafting through reactive extrusion, and which have functional groups in the molecule or form them in the alkaline electrolyte, the functional groups being active as Lewis acids.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: August 5, 2008
    Assignee: Carl Freudenberg KG
    Inventors: Wolffried Wenneis, Harald Hoffmann, Birgit Severich, Hartwig Höcker, Helmut Keul
  • Alkaline cell or battery
    Publication number: 20030049539
    Abstract: An alkaline cell or battery having at least one positive and one negative electrode which are separated by a separator and which are disposed, along with an alkaline electrolyte, in a housing, the separator being a non-woven fabric, a microporous foil, or a web made of one or a plurality of polymers, which are formed by copolymerization or grafting through reactive extrusion, and which have functional groups in the molecule or form them in the alkaline electrolyte, the functional groups being active as Lewis acids.
    Type: Application
    Filed: September 6, 2002
    Publication date: March 13, 2003
    Inventors: Wolffried Wenneis, Harald Hoffmann, Birgit Severich, Hartwig Hocker, Helmut Keul
  • Method for the manufacture of cross-linked and optionally foamed polypropylene
    Patent number: 4442233
    Abstract: Disclosed herein is a process for producing cross-linked polypropylene by subjecting a homogenous mixture of a polypropylene with from about 2 to about 20 weight percent, based upon the weight of the polypropylene, of polybutadiene with a molecular weight of from about 500 to about 10,000 to conditions sufficient to effect cross-linking, for example, through the use of cross-linking agents and/or irradiation. In addition, the process disclosed herein may be utilized to produce cross-linked and foamed polypropylenes.
    Type: Grant
    Filed: June 17, 1982
    Date of Patent: April 10, 1984
    Assignee: Firma Carl Freudenberg
    Inventors: Ernst Lohmar, Wolffried Wenneis